I suspect the RM may have mentioned better NGS in passing, and that the Army couldn't give a stuff. Also good to get yourself out of harm's way, but I just don't see a gun, even with advanced ammo, outranging something like a Silkworm. I imagine the case turns merely on a long-term investment appraisal of using a common, developing system instead of a bespoke one.
Also, I for one am pleased to se that at least somebody is taking TBMD seriously. And I agree, I'd rather have more surface combatants, but as we've put all our eggs into the 'two carriers' basket, I guess we'll have to live with what we can get